You don′t need to change dashboards since the switches and instruments are suited to the V8, although the speedo and tachometer will require modification to adjust them to your V8′s gearing and cylinders.

One further advantage of the ‘J’ type overdrive units is that the speedo drive gear on the rear drive shaft of the gearbox can be changed, thereby adjusting the speedo-drive ratio to suit the TR′s 15in wheels.